I personally do not think it needs a buff at all. (This is me falling for a troll's trap if this was a joke)
The fact that the hafted blade is small and faster then most poles already makes it very effective. The shortness is especially helpful considering it is one of the few small 4 directionals that does full damage rather then spears and such. It is also helpful when in groups because you will less likely bounce off the person behind you or next to you when swinging.
I also loved the hafted blade as a weapon, although I think it is perfectly fine as it is. If anything, maybe tweak it so the thrust does cut damage and increase it a couple points. I think something like that doing pierce is a bit silly.
Final opinion: I think its perfectly fine as it is